<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>3个数加减法</title>
    <link rel="stylesheet" href="../../css/css.css" media="all">

</head>
<body>
<div style="float: left;">
    <div id="t1" style="width: 800px">

    </div>
</div>


<script src="../../js/jquery-3.5.1.min.js"></script>
<script src="../../js/xxn.js"></script>
<script src="addition3.js"></script>


</body>
</html>